Viewing archive of Saturday, 21 September 2013 - Sunspot regions
Courtesy of SDO, SOHO (NASA) and the [AIA, EVE, and/or HMI] consortium.
| Sunspot number | New regions | Background flux | Maximum flux | C |
|---|---|---|---|---|
| 79 -6 | 0 | B3.86 | C1.52 | 4 |
Sunspot regions
Region 11841 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 10 | HRX | S04W52 | |
|
||||
Region 11843 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 8 2 | 50 -10 | CSO | N02W35 | |
|
||||
Region 11846 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 2 | 160 -20 | CSO | S17E36 | |
|
||||
Region 11848 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 1 | 0 -10 | AXX | S11E23 | |
|
||||
Region 11849 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 7 4 | 10 | BXO | N22E18 | |
|
||||
Region 11850 |
||||
|---|---|---|---|---|
| Number of sunspots |
Size | Class Magn. | Class Spot | Location |
| 4 3 | 90 80 | DAO | N08E64 | |
|
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Solar flares on this day | ||||
| C1.42 C1.13 | ||||
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| Last M-flare | 2025/12/06 | M8.1 |
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| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 167.7 +75.9 |
| Last 30 days | 107.1 +13.7 |